Answer:
keratin
Your nails are made of keratin
Keratin is a type of protein that forms the cells that make up the tissue in nails and other parts of your body.
Explanation:
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<h2>Answer</h2>
Chemoautotrophic bacteria obtain their carbon from <u>CO2</u> and their energy from <u>rea</u><u>c</u><u>tion</u><u>s</u><u> </u><u>involving</u><u> </u><u>inorganic</u><u> </u><u>chemicals.</u>
<h3>#CarryOnLearning</h3>

I'm sure it's true .because sperm particles contain 250 million particles.
If we look to the nucleus contain 1.5 million neurons.